Bolt or nut tightening device



FIG. 1 is a first perspective view of a bolt or nut tightening device ofthe present design, as seen from diagonally left upward;

FIG. 2 is a second perspective view thereof, as seen from diagonallyright upward;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a sectional view taken on line 8—8 of FIG. 4 omitting internalmechanism of the device;

FIG. 9 is a sectional view taken on line 9—9 of FIG. 3

FIG. 10 is a sectional view taken on line 10—10 of FIG. 3

FIG. 11 is a sectional view taken on line 11—11 of FIG. 3

FIG. 12 is a sectional view taken on line 12—12 of FIG. 3

FIG. 13 is a sectional view taken on line 13—13 of FIG. 3; and,

FIG. 14 is a sectional view taken on line 14—14 of FIG. 3.

The broken lines are shown in the views for illustrative purposes onlyand form no part of the claimed invention.

The ornamental design for bolt or nut tightening device, substantiallyas shown and described.